Variability of lamellar corneal flap thickness at different suction ring vacuum settings during keratomilieusis

R. Kwun, R. Pangilinan, L. Moreira, N. Kasetsuwan, D. Sanchez, S. Shah, S. Schallhom, Peter J McDonnell

Research output: Contribution to journalArticle

Abstract

Purpose. To determine if suction ring vacuum settings above the manufacturer's recommended settings significantly alter coraeal flap thickness during keratomileusis. Methods. Eight human cadaver eyes were studied. A Phoenix Keratek microkeratome was used to create the lamellar corneal flap using a standard 160 micron insert following the standard techniques described by the manufacturer. Two vacuum pressures were studied, and the eight eyes were divided equally into two groups. In the first group of four eyes, keratomileusis was performed using the manufacturer's recommended vacuum setting of 488mm Hg. The second group of four eyes had keratomileusis performed at 600 mm Hg. Cornea flap thickness was determined centrally using a Mentor Pachypen. Results. In the 488mm Hg group, corneal flap thickness remained constant at 160 microns ±10. In the 600mm Hg group, the flap thickness varied from 0 microns to 280 microns. Two flaps in the 600 micron group exhibited irregular configurations. Conclusion. Vacuum settings are important variables in determining consistent corneal flap thickness in keratomileusis. Consistent flap thickness is more predictable at the manufacturer's recommended suction of 488mm Hg.

Original languageEnglish (US)
JournalInvestigative Ophthalmology and Visual Science
Volume38
Issue number4
StatePublished - 1997
Externally publishedYes

Fingerprint

Suction
Vacuum
Mentors
Cadaver
Cornea
Pressure

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Variability of lamellar corneal flap thickness at different suction ring vacuum settings during keratomilieusis. / Kwun, R.; Pangilinan, R.; Moreira, L.; Kasetsuwan, N.; Sanchez, D.; Shah, S.; Schallhom, S.; McDonnell, Peter J.

In: Investigative Ophthalmology and Visual Science, Vol. 38, No. 4, 1997.

Research output: Contribution to journalArticle

Kwun, R. ; Pangilinan, R. ; Moreira, L. ; Kasetsuwan, N. ; Sanchez, D. ; Shah, S. ; Schallhom, S. ; McDonnell, Peter J. / Variability of lamellar corneal flap thickness at different suction ring vacuum settings during keratomilieusis. In: Investigative Ophthalmology and Visual Science. 1997 ; Vol. 38, No. 4.
@article{30872521fa664661a71a51cdb70a65bf,
title = "Variability of lamellar corneal flap thickness at different suction ring vacuum settings during keratomilieusis",
abstract = "Purpose. To determine if suction ring vacuum settings above the manufacturer's recommended settings significantly alter coraeal flap thickness during keratomileusis. Methods. Eight human cadaver eyes were studied. A Phoenix Keratek microkeratome was used to create the lamellar corneal flap using a standard 160 micron insert following the standard techniques described by the manufacturer. Two vacuum pressures were studied, and the eight eyes were divided equally into two groups. In the first group of four eyes, keratomileusis was performed using the manufacturer's recommended vacuum setting of 488mm Hg. The second group of four eyes had keratomileusis performed at 600 mm Hg. Cornea flap thickness was determined centrally using a Mentor Pachypen. Results. In the 488mm Hg group, corneal flap thickness remained constant at 160 microns ±10. In the 600mm Hg group, the flap thickness varied from 0 microns to 280 microns. Two flaps in the 600 micron group exhibited irregular configurations. Conclusion. Vacuum settings are important variables in determining consistent corneal flap thickness in keratomileusis. Consistent flap thickness is more predictable at the manufacturer's recommended suction of 488mm Hg.",
author = "R. Kwun and R. Pangilinan and L. Moreira and N. Kasetsuwan and D. Sanchez and S. Shah and S. Schallhom and McDonnell, {Peter J}",
year = "1997",
language = "English (US)",
volume = "38",
journal = "Investigative Ophthalmology and Visual Science",
issn = "0146-0404",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "4",

}

TY - JOUR

T1 - Variability of lamellar corneal flap thickness at different suction ring vacuum settings during keratomilieusis

AU - Kwun, R.

AU - Pangilinan, R.

AU - Moreira, L.

AU - Kasetsuwan, N.

AU - Sanchez, D.

AU - Shah, S.

AU - Schallhom, S.

AU - McDonnell, Peter J

PY - 1997

Y1 - 1997

N2 - Purpose. To determine if suction ring vacuum settings above the manufacturer's recommended settings significantly alter coraeal flap thickness during keratomileusis. Methods. Eight human cadaver eyes were studied. A Phoenix Keratek microkeratome was used to create the lamellar corneal flap using a standard 160 micron insert following the standard techniques described by the manufacturer. Two vacuum pressures were studied, and the eight eyes were divided equally into two groups. In the first group of four eyes, keratomileusis was performed using the manufacturer's recommended vacuum setting of 488mm Hg. The second group of four eyes had keratomileusis performed at 600 mm Hg. Cornea flap thickness was determined centrally using a Mentor Pachypen. Results. In the 488mm Hg group, corneal flap thickness remained constant at 160 microns ±10. In the 600mm Hg group, the flap thickness varied from 0 microns to 280 microns. Two flaps in the 600 micron group exhibited irregular configurations. Conclusion. Vacuum settings are important variables in determining consistent corneal flap thickness in keratomileusis. Consistent flap thickness is more predictable at the manufacturer's recommended suction of 488mm Hg.

AB - Purpose. To determine if suction ring vacuum settings above the manufacturer's recommended settings significantly alter coraeal flap thickness during keratomileusis. Methods. Eight human cadaver eyes were studied. A Phoenix Keratek microkeratome was used to create the lamellar corneal flap using a standard 160 micron insert following the standard techniques described by the manufacturer. Two vacuum pressures were studied, and the eight eyes were divided equally into two groups. In the first group of four eyes, keratomileusis was performed using the manufacturer's recommended vacuum setting of 488mm Hg. The second group of four eyes had keratomileusis performed at 600 mm Hg. Cornea flap thickness was determined centrally using a Mentor Pachypen. Results. In the 488mm Hg group, corneal flap thickness remained constant at 160 microns ±10. In the 600mm Hg group, the flap thickness varied from 0 microns to 280 microns. Two flaps in the 600 micron group exhibited irregular configurations. Conclusion. Vacuum settings are important variables in determining consistent corneal flap thickness in keratomileusis. Consistent flap thickness is more predictable at the manufacturer's recommended suction of 488mm Hg.

UR - http://www.scopus.com/inward/record.url?scp=13144277766&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=13144277766&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:13144277766

VL - 38

JO - Investigative Ophthalmology and Visual Science

JF - Investigative Ophthalmology and Visual Science

SN - 0146-0404

IS - 4

ER -